Earnings (Loss) Per Share (Tables)

12 Months Ended

Dec. 31, 2013

Earnings (Loss) Per Share [Abstract]

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

The following table lists the weighted average number of stock options and restricted stock units excluded from computation of diluted earnings per share at December 31, 2011, 2012, and 2013 as there impact would be anti-dilutive:

	Year Ended December 31,
	2011	2012	2013
Stock options	1,257	984	707
Restricted stock units	291	37	3

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

The computations of basic and diluted income per share for the years ended December 31, 2011, 2012, and 2013 are as follows:

	December 31,
	2011		2012		2013
Numerator:
Net income	$	25,226	$	43,865	$	3,458
Denominator:
Basic earnings per share - weighted average shares outstanding	31,744		32,226		32,783
Effect of potential diluted securities:
Employee stock options and restricted stock units - dilutive shares	512		627		605
Diluted earnings per share - weighted average shares outstanding	32,256		32,853		33,388
Earnings per share:
Basic	$	0.79	$	1.36	$	0.11
Diluted	$	0.78	$	1.34	$	0.10